Cummins ISB 6.7L SCR Outlet Module 2013-2018: OEM 4388435RM-SCR
SCR Outlet Stage Control for Cummins ISB 6.7L Engines (2013–2018)
What is it?
The Cummins ISB 6.7L SCR Outlet Module, identified by OEM 4388435RM-SCR, is an emissions aftertreatment component designed for engines produced between 2013 and 2018. This module is located at the downstream end of the Selective Catalytic Reduction (SCR) system, where exhaust gases complete the final phase of emissions processing before exiting the system.
Within the SCR process, Diesel Exhaust Fluid (DEF) is introduced and converted into ammonia, which reacts with nitrogen oxides (NOx) to form nitrogen and water vapor. The outlet module helps manage this final stage by maintaining proper exhaust flow and supporting the overall structure of the aftertreatment system.
Why choose this SCR Outlet Module?
The final section of the SCR system plays a key role in ensuring emissions are fully treated before release. The OEM 4388435RM-SCR module is designed for Cummins ISB 6.7L platforms, helping maintain consistent exhaust movement and proper system balance.
After exhaust gases pass through the SCR catalyst, they must exit smoothly to prevent backpressure and maintain efficiency. If the outlet section becomes restricted, damaged, or misaligned, it can affect the entire aftertreatment process—leading to warning alerts, reduced system efficiency, or uneven exhaust flow.
Replacing the outlet module helps restore proper exhaust discharge and supports stable system operation across all aftertreatment stages.
Key Benefits
✅ OEM-matched SCR outlet module for Cummins ISB 6.7L engines
✅ Supports final-stage exhaust flow after NOx conversion
✅ Helps maintain balanced pressure within the aftertreatment system
✅ Works alongside DEF dosing and catalyst components
✅ Direct-fit design for proper fitment and installation
Applications
This SCR outlet module is used on diesel engines equipped with the Cummins ISB 6.7L platform manufactured from 2013 through 2018. These engines are commonly found in medium-duty trucks, buses, and commercial vehicles that rely on SCR systems for emissions compliance.
Installation Notes
Allow the exhaust system to cool completely before beginning service. Remove the existing outlet module and inspect nearby components such as sensors, clamps, and exhaust piping for buildup or wear. Install the replacement unit using proper seals and mounting hardware to ensure correct alignment. After installation, clear any stored fault codes and verify proper system operation using diagnostic tools.
Final Thoughts
The outlet stage is a critical part of the emissions process, ensuring treated exhaust gases exit the system efficiently. The Cummins ISB 6.7L SCR Outlet Module (OEM 4388435RM-SCR) helps maintain smooth exhaust flow and supports consistent aftertreatment performance.